Classic car owners only waxes/cleaners?
I would give a good wash and then maybe a clay treatment. After you get all the barnacles off the car, you need to determine by condition if you need Rubbing Compound, Polishing Compound, Wax with a cleaner in it, or just a paste wax. If it shins and doesn't look milky, then the polishing or wax with cleaner will work best. If you have the cash, have a Pro Detail it and they have all the compounds and can buff the surface without burning through the sharp edges.